Figure 1. 1600 Diaphragm Air Motor with
Wafer Type Butterfl y Valve.
The following fi gures are based on 26° movement of the air
motor arm and 90° movement of the control valve.
Maximum AVAILABLE TORQUE*
35 pound-inches for standard 1600 Air Motor
245 pound-inches for motor with optional top mounted
1600 Air Motors are compact and lightweight, with cast aluminum
housings. Diaphragms are synthetic rubber impregnated duck.
All bearing surfaces are large to assure long life. Total slack in a
properly assembled linkage between motor and valve is 0.015",
which converts to a valve motion angular slack of only 0.296°.
Motor and valve assemblies can be mounted in any position
without aff ecting operation.
The 1600 Air Motor is factory set to go from fully closed to fully
open with an air pressure signal of 3-15 psi. When the standard
positioner is used, the "zero" point, or minimum actuating control
actory set at 3 psi, can be fi eld adjusted between
0 and 9 psi. Factory assembled motor and valve combinations
have linkage set for full travel and will open on control air pres-
sure increase. Reverse action is available if specifi ed.
1600-P - Integral Top-mounted Positioner
When increased torque is necessary to operate large valves
or valves controlling dirty or high pressure fl uids, maximum
accuracy of valve response to minute variations of impulse air
pressure can be obtained by using a top-mounted positioner with
the 1600 Air Motor. (See Bulletin 1600-P).
1600-B Optional Speed Control for Air Motor
Because of system design or slow span-step and response-time
rating of the instrument, some control instruments require slow
responding air motors to dampen oscillations associated with
poor system performance.
1600- -B and 1600- -BP (with positioner) Air Motors have a
special volume chamber with needle valve that can be adjusted
for full travel speeds of 31 to 81 seconds. Consult North American
for details. (See Bulletin 1600-BP).
1600-A Air Motor with SPDT limit switches in a general pur-
pose enclosure. (See Bulletin 1600-A)
1600-HL Air Motor with NEMA 4 high and low limit switches.
(See Bulletin 1600-HL).
1600-M Air Motor with dual display monitor and position
transmitter. (See Bulletin 1600-M).
1600 Air Motor Greasing Instructions
Any soda base grease of a No. 2 or medium hard consistency
can be used. The ambient temperature range for a grease of this
type is -40°F to 250°F. The motor should be re-greased at least
once each month. Grease should be forced in until new grease
appears outside the bearing ends. Even if the air motor is not
used, grease should not be allowed to stay in the unit more than
Use available torque fi gures when determining if a positioner is required.
Product Overview | 1600 Air Motors